Buttonhole-stitching attachment for sewing-machines.



VEimomg. BUTTONHOLE- STITQHING ATTUHMENT FOR SEWING MACHINES. APPLLGATION FILED AUG. 2, 1909. @Wypg il n Patented Nov. 22, E916.

2 SHEETSQSHEET l.

@imm/maia l amaai.

. To 1U 'whom it nary concern:

4the workholder. tion of thersame, on line5-5,Fig. il. Fig. 6 yis a section. on line 6-G, Fig..1, showing aY longitudinal section of the workholder, the' a slot, 2, in said plate,

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iiNiTnlo sTATns PATENT onirica.

IEIMANUELA JOHN BOYLER, OF OTTAWA, ONTARIO, CANADA, ASSIGNOR 01? JOHN HAROLD ALFORD, OF

)ONE-HALF TO OTTAWA, ONTARIO, CANADA,

BUTToNHoLE-STITCHING ATTACHMENT Fon sannita-Medianas.

llc vit known that l, EMANUEI. Joux Berman, residing at Ottawa, in the county ot vfCarlcton, Province of Ontario, and'Dominvion of Canada, have invented new and useful Improvements 1n Buttonhole-Stitclimg Attachments for Sewing-Machines, ol' winch thefollowing a specification. I

My invention which will be hereinafter fully set forth and claimed' relates to attachments to sewing machines for stitching buttonV holes.

The objectY of my invention is anattach- 'ment for 'sewing machines by-nleans of Lwhich button holes can he stitched, an attachment of simplerconstruction and that ;can he' moved.

readily attached, adjusted and re'- `Figure :l i's a planet' my improved button .f .holeattachment, shownattache'd to the plate .olf a 1 `sewi n'g machine. Fig.Y 2. is a siinilar A.p'lan, showing the rack bar, thrown "ont of holder removed but shown 4gear and the work dotted, exposing' the parts 'below the latter.

fliig. 3 is afpartial view of the same, with the ratchet wheel moved one tooth and the -gworkholder (shown dotted) thrown in the reverse position. Fig. -t is a bottom view of Fig. 5 is a transverse secitop leaf ofthe same-lifted'for the insertion fof work.lv Figs. '7 and 8 are transverse sec- -tions on lines 7 7 and 8-8, Fig. 1 respectively. Fig. 9. is an end View, showing the connection of the rack with the workholder. Fig. 10 is an elevation of the end opposite to `the one shown in Fig. 9 and showing a method of carrying the device on the presser lrod,.aud Fig. llis a plan view of the same.

B is ahase platewhicli may be attached jto 'the plate (A) of'a sewing .machine by m'cans'of a thuinb screw, B2, passing through Figs. 1, 2, 3 and 9, `when the plate A has a. hole for thesame in the proper position, or it may beprovided -with a bracket such as B1, Figs. 10 and l1, and secured to the presser rod, A2, of the Amachine, in the same well known manner as the presser foot or other attachments now in general use. The bracket B1 may be formed integrally with the plate B or it may he riveted 'or otherwise secured ,to it; the screw A3 holding it' on the presser rod.

Patieixtctl Xov. Q2', serial No. 510,910.

`A, Figs, l, '2, 3, G, 10 and il denotes the iieedle, shown for thc salve. ot' indicatingthe l' relative position of the parts. A" denotes the positive feed, A and .-J are respectively insertion plate and slides in the inachine plate. l

A feed lever. C, Figs. l, Q, Sand 10,-is pivotcd, as atti, upon thc hase plate B and furnishes the operating movements of the device, itself receiving motion from Athe machine feed Af. For this purpose the opertated end projects heg-mid the las@ plate and has a claw, C1, pivoted to it, which is adapted to be cngagedby the feed A4, operating against the pressure of a spring, (13,'l1e'ld on a. post C and pressing it against a stop, Z1,A nickedout of and raised on the plate.

at c, Fig. 2) and carries is'pivotcd to it and held by an extension, c3, ofthe spring C3 which presses the point. into engagement-,with a ratchet wheel, D?, when the ffeed A4. moves the lever'C backward and mariees-the operating end c to swing' forward. The ratchet wheel Dlis concentric with and fast.- -upon another larger one, D, re` sembling a ratchet wheel hut acting as a cam wheel and having onlyY half the number of teeth, the back of each of which leaves intact a part of the periphery of the disk forming it, 27. c., the back slope does not cxtend from the bottom of the one tooth to the point of the next, but runs out into the periphery, as shown in Figs. l, 2 and 3. A pinion, D2, is fast upon the ratchet wheel, lall three being integral or connected to turn in unison upon the saine stud, (i, which is fast. upon the haseplate. y A follower in the shape of a pawl, E, Figs. l, 2, 3, G and 8, is pivotcd by a stud, El, upon the base plate B in longitudinal line with theneedle A?, whichfpawl carries near itsy free'broad; end' a stud, c, also in line with needle and pivot center.`v The rear corner, adjacent to the'cam wheel, is formed with anl angular point,fe1. to titthe teeth of a pallet, C2, which the cam wheel, the opposite orfrontcorner ratchet wheeland: consequently the Vpawl The operating -end is cranked rearwardv (as .point e1 goes alternately to the bottom of With a line passing through the needle A1 and the stud E1, for the purpose to be presently described.`

The workholder is composed of two thin bars F and F1, one on top of the other, the upper one secured upon the lower at, the operated end and acting as a spring, as

' shown Vparticularlyin Figs. 4, 5, 6, 7 and 8.

The lower bar F is provided with'a longitudlnal slot, 4, extending nearly to the ends.

At the operating end this slotfterminates g with a larger eye, 5, adapted to pass vthe l enlarged fiat' head of the stud E1 which acts as plvot to the pawl E. vThefree V neck i lof the stud E1 iand the stud e carried 'b'y the pawl areof the samediameter and vfit the slot 4, so. that the bar F ma 'slide freely l ifone of the edges of the slot 4 and the holder upon the two studs and be he d downrupon the pawl E byrthe head of the tstud E1which rpla'eedready for the start.

the stud g2 ofthe arm g1 engaging one ofprojects over the edges of the slot. v`v It will be noted that when'thus assembled`the bari F must'participatey in the oscillating movei ments of the paw'l E, as caused bythe vcam wheel l), turning inits limited movements upon the stud The pawl- E isof slitticient width at its free end that the'points e1 and e2 Aproject at each sidel and-are free pass through when the bar is thrown on one side or the other and clear the .edges of the slot and also make the necessary length-of stitch transversely acrossthe slot.`

The top bar F1 acts as a spring clamp, being attached to the lower bar at the operated end and slotted or forked. at the operatingend to register with lthe slot 4. 1A thumb ,piece j is provided for lifting the -free end andl inserting the work between the two bars, as shown in Fig. 6. The forked operating ends, f1, ofthe spring bar F1 have their outer edges, f2, serrated. and turned down to pass into slots, 6, in the bar F, as

shown in Figs. 4 and 5. The operated end of the workholder is provided with a-couple of transverse slots, 7, as shown in Figs. 1, 4 and 6; these will be referred, to again.-

The traverse of the workholder is effected as follows: G, Figs. 1, 2, 7 and 8, isfa double rack bar having at its forward end a central downward projecting stud, G1 (Fig. l) engaging a slot, 8, in and near the rear edge of the base plate, in line with the center of g the pinion D2, said stud adapted to slide in At the rear end is formed aA handle, g, and an arm, g1, extends across said slot.

The slot 4 at the same timeis Vof such a width that the needle A1 may to the workholder F F1, the end of said bar being provided with a stud, g1' (Figs. 2 and fl) which is adapted to engage either one of the slots 7 in said workholder. The rack barl is provided witha longitudinal slot, 9,- the edges of which are formed with teeth, g3, which gear into the pinion D. The width of the slot 49 is such that when one side is in gear with the pinion D1', the opposite rack clears the latter. It will be observed that as the ratchet wheel D1 turns tooth for tooth, the rack will be moved by the pinion in one direction or the other, according to which side of the rack is in gear and the workholder will move in unison with the rack.

rl`he nick b1, Figs. 1, 2, 3 and 10, is made in thebase plate and th'e metal turned down to :form an abutment meeting the joint of the circular plate A5 where such exists; when the jointdoes not exist the abutment will not be so effective, but not ,objectionl able.

required Side of the pinion D1 by the handle g.v For. each movement of the feed A* the 'workholder makes an oscillation to one side while also sliding upon the studs E1 e.

lVhen the end of the cut in thematerial is reached, the rack G is reversed, c., pressed intot'engagement on the opposite side and the workholder is now ready to return in the same manner as it advanced. Before proceeding, however, the material must be shifted so that the other side of the button hole comes within the slot 4. For extra "long button holes, the stud g2 is moved from one slot 7 into the other. The rack G has a certain iexibility which enables it to be readilylifted out of engagement.

I claim as my invention 1. In a buttonhole stitching attachment, the combination of a base plate,'means of holding the same in position on the plate of a sewing machine, a feed lever pivotally securedupon the said base andhaving one end in engagement-with the positive feed of the machine, a pallet pivotally secured at the other end of said lever, a spring returning said feed lever at the end of the movement imparted by the positive feed, a ratchet wheel in gear with the'said pallet, a larger cam wheel journaled upon Said baseplate and upon which 'said ratchet wheel is fast and having only half the number of ratchet- Wiegel oted upon the base plate and carrying a stud and having a point at one side which is in engagement with the cam wheel, a spring engaging said pawl and preseingsaid point into engagement, a headed stud Lipon which said pawl is pivoted, a bar having a longitudinal slot engaging the headed pivot and thestud on the pawl and sliding thereon and extending with itselot under the needle and provided with a transverse slot at the rear end for engagement with the stud of the rack arm, a spring bar Secured at gine end uiion the end of the aforesadbar and having its forward end slotted to register with the Slot in the har below, meane` on said Spring bar for holding the material for stitching under the forward end thereof and a thumb piece for lifting the :forward end of said spring bar, substantially as Set forth.

i2. In a buttonhole Stitching attachment, the combination of a hase plate, means of holding the same in position on the plate ot' a sewing machine, acam wheel journaled upon a' stud Secured to said lease plate, a ratchet wheel smaller than and concentric with and fast to said cam wheel and having double the number of teeth otf said cam wheel, a pinion upon and tast to Said ratchet ,I

wheel, means for turning Said ratchet wheel one tooth t'or each descent of the needle liar, a lSlotted har having the edge of the slot serrated with teethgeariiig with said pinion said bai` terminating in a handle and having` a laterally extending arm 'arrying a Stud, means for holding' said rack bar slidingly in the hase plate .i flat paivl-like l follower pivoted to Said base plate anl a stud and carrying a stud and having a point l engaging said cain wheel, a spring'lioldmg said follower in engagement with said cam I wheel and a slotted woikholdei held slidf ingly on the studs of said -follower and 'engaged by the arm of the rack bar, substantially as set forth. h I 3. In a buttonholestitching attachment l' for sewing machines, the combination of aJ i hase plate, means of holding the saine on :the plate of a eewing machine, a flat pawl i like follower. pivoted. upon said base plate carrying a stud, a stud forming the pivot .i of Said pawl having a neck of the same diameter. as the stud on the pawl with an overlapping flat head, meansl of giving an oscillating motion to said pawl, a bar having a slot engaging the pivot stud and the l pawl Stud slidingly and through which th'e ,l needle may pass, a spring bar secured at one end upon t-lie end of the aforesaid har and r having its other end slotted to register' with the slot in the lower bar and its outer edges turned down and pass into Slots in the lower har, a Suitable thumb piece for lifting said spring bai' which latter acts as a clamp upon the material placed between the two bars o and means of giving a sliding' motion to said bai' and clamp, substantially as Set forth.` I In testimony whereof I have allixed my )siguaturq in presence of two Subscribing witiiessee.

EMANUIGL .lOl-IN BOYLER. lVitnesses A. I'IAnvnY, B. HARVEY. 

